WIRED SCIENCE | Experiment Cave | PBS

We head to two underground labs that are hunting down neutrinos, the most elusive particles in the universe, in hopes of answering some of humankind’s most fundamental questions. We’ll find out why understanding the farthest reaches of the heavens demands that we travel to the deepest places on earth. To see the full segment, visit http://www.pbs.org/kcet/wiredscience/video after original broadcast.

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